Actinorhytis is a monotypic genus of flowering plant in the palm family found in Oceania and southeast Asia. The lone species, Actinorhytis calapparia (commonly known as calappa palm) is a rain forest inhabitant and has the largest fruit of any palm in the Iguanurinae. The genus name is from two Greek words meaning 'ray' and 'fold' which describe the endosperm of the seed.